Pharmaceutical & medical 5 Manage teMperature rise
A very tightly configured motor will naturally get hotter than one with its heat generating elements spaced farther apart. This problem gets even worse if voltage and current are increased to meet power requirements. To offset this effect, materials for the housing of the motor can be chosen to conduct heat away from the motor coils.
6 Motor integration
While individual powertrain component choices can help to minimise the size of the tool, often the best approach is to take a more holistic view of component integration. A motor, for example, is traditionally built within a metal housing, which is then surrounded by the outer casing of the hand tool. But are both needed? Could the motor supplier instead either provide a motor with a housing that can double as the outside of the hand tool, or coordinate with the tool manufacturer to build the motor directly into the tool’s outer casing (frameless design)? Similarly, incorporation of other features
INS-FEB21-KELLER.qxp_Layout 1 02/02/2021 09:46 Page 1
such as tool drivers, seals, electrical connectors, and mounting hardware can be designed directly into the motor to eliminate redundancies and save space.
Portescap
Spur vs planetary gear construction We can see, then, that by focusing on the motor design considerations that impact on size and
power, the surgical hand tool manufacturer has a number of opportunities to reduce the overall envelope of the tool whilst still meeting the performance objectives. In most cases, much to be gained by involving an experienced motor partner at the concept or even ideation phase of development.
www.portescap.com
SERIES M5
ULTRA-FAST PRESSURE TRANSDUCER EXTREMELY COMPACT DESIGN
50 kHz • Operating -50...180 °C • Linearity 0,1 %FS • IP65 Pressure ranges of 3 bar, 10 bar and 30 bar absolute. Media compatible with oil, fuels, gases and coolants. Test benches • Leakage • Wind tunnels • Aviation • Compressors • Explosion waves
keller-druck.com Instrumentation Monthly June 2021 21
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